Steam-boiler



(NoModel.) 2 Sheets-Sheet 1.

F. 0. BURROWS.

STEAM BOILBR.

No. 348,315. Patented Aug. 3l, 1886.

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(No Model.) 2 Sheets-Sheet 2.

F. o. BURROWS.

STEAM BOILER.

No. 348,315. Patented Augfl, 1886.

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FRANCIS O. BURROVS, OF CLEVELAND, OHIO.

STEAM-BOLER.

SPECIFICATION forming part of Letters Patent No. 348,315, dated August31, 1886.

Application filed February 23, 1886. Serial No. 192,962. (No model.)

To @ZZ whom, it' may concern:

Be it known that l, FRANCIS O. BURRoWs, of Cleveland, in the county ofCuyahoga and State of Ohio, have invented certain new and usefulImprovements in Steam Boilers, of which the following is a specication.

This invention relates to steamboilers; and it consists in certainpeculiar features of construction and arrangement of the parts, ashereinafter fully described, and pointed ont in the claims.

In the accompanying drawings, Figure l is a frontend elevation, and Fig.2 is a rear end elevation, of my improved boiler. Fig. 3 isacross-section, and Fig. et is a longitudinal and vertical section, ofthe same.

The nature and objects of the invention will fully appear from thesubjoined description, when considered in connection with the drawings.

A represents a cylindrical casing or jacket, in which is contained allthe parts comprising the boiler and its heating-furnace.

B is a cylinder comprising the combustionchamber. It is about two-thirdsthe diameter of the outer cylinder, A, and about threefourths itslength. To the rear of the said cylinder B is annexed an enlargedsub-chamber, C, the crown of which stands higher than the crown ofchamber' B, and is flattened across its top portion. This doublecombustion-chamber is secured within the aforesaid outer cylinder bymeans of stay-bolts bb, joining the heads of the two cylinders firmlytogether. This combustion-chamber is made a few inches shorter than theouter cylinder, and is situated near to thelower side thereof, thusleaving a space all around said combustion-chambcr, thereby providing acomplete water-jacket, entirely surrounding it. In the lower forwardpart of said combustion-chamber is provided a furnacegrating, D, therear ends of the bars of which are supported by a bridge-wall, D.

E F are door-openings fixed in the two cylinders and leading into thelire-place for feeding fuel to the furnace. Beneath the said openings EF is another broad door-opening, G, leading into the ash-pit. At therear end of the boiler is also a door-opening, H, for the convenience ofgetting into the rear part of the combustion chamber for cleaning or repairs. Vit-hin the combustion -chamber is arranged a series ofwater-dues, I, connected with the water-space at each end of the boiler.

Partially surrounding the combustion-chamber B is a series of4smoke-fines, J, connected with the inner vertical wall of thesub-chamber C and leading outward through the front wall of the outercylinder, A, where the boiler is to be provided with a smoke-hoodconnected with a smokestack or chimney.

In the front and rear end walls of the outer cylinder, A, are providedholes directly opposite the ends of the fines I, which are provided withserew-plug stoppers K. The` object and purpose of these holes is toprovide a means for removing, replacing, or cleaning these fines.

In the rear end of cylinder A, connecting it with the rear wall of thesub-chamber C, the stay-bolts c c are made tubular and are closed at theouter ends with plugs, similar to the plugs K, but smaller. Thesetubular stay-bolts c c are located directly opposite the inner ends ofthe smoke-ilues .I and are provided as a means for blowing out andcleaning out the said smoke-dues. The method of doing this is asfollows: By withdrawing the plug from the tubular bolt and insertingapipe therein, reaching through and entering the end of the sn1oke-iue,andinjecting steam through said pipe into the flue, the soot and dirtmay be cifeetually discharged into the hood, thence into the smoke-stackor chimney. The water fiues are arranged in arch form over the lires ofthe furnace, and are thus exposed to the full heat of the furnace, theproducts of combustion passing up between said ilues and into thesub-chamber, thence through the smoke iiues J into the stack or chimneyin the direction indicated by the ar rows. The boiler is su rmountedwith a steamdrum L.

Having described my invention, I olaim- 1. In a steam-boiler, thecombination of an outer cylinder, A, an inner cylindricalcombustioirchambeigB, and annexed enlarged subchamber C, said cylinder Bprovided with fire-grating D and supporting bridge-wall D', thecombustiolrchambers B C having the series of water-fines I arrangedwithin, and the IOO said chamber B surrounded with a series of locatedopposite to the ends of the fines J, as smoke-fines, J, leading from thesub-chamber andfor the purpose specified. forward and through the frontend Wall of the casing A, substantially as described.

2. The combination, with the rear head of Vitnesses: the boiler-casing Aand the rear Wall of the AW. M. HAYDEN, sub-chamber C, of the tubularstaybolts c c, GEO. W. TIBBITTS.

FR ANGIS O. BURROWS.

